Fora do MTRR na inicialização

Question

Parece que meu laptop (um Acer Aspire One AOA150) fica sem MTRR na inicialização. Fiz algumas pesquisas sobre o problema e li que as pessoas recomendam ativar o saneamento MTRR para consertá-lo, no entanto, ele ainda ocorre. Estou executando o Arch Linux (mas isso não importa). Você pode ver que eu habilitei a sanitização de MTRR aqui:

[chris@helios ~]$ zgrep 'SANITIZER' /proc/config.gz
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1

Estas são as informações relevantes do meu sistema:

uname -a:

Linux helios 2.6.38-aao-light #1 SMP PREEMPT Fri Apr 1 03:02:37 BST 2011 i686 Intel(R) Atom(TM) CPU N270 @ 1.60GHz GenuineIntel GNU/Linux

dmesg avisos potenciais:

[    0.000000] Notice: NX (Execute Disable) protection missing in CPU!
[    0.000000]  RCU-based detection of stalled CPUs is disabled.
[    0.000000]  Verbose stalled-CPUs detection is disabled.
[    0.157222] ACPI Error: [CAPB] Namespace lookup failure, AE_ALREADY_EXISTS (20110112/dsfield-143)
[    0.157393] ACPI Error: Method parse/execution failed [\_SB_.PCI0._OSC] (Node f682fca8), AE_ALREADY_EXISTS (20110112/psparse-536)
[    0.157578] ACPI: Marking method _OSC as Serialized because of AE_ALREADY_EXISTS error
[    0.160212] pci 0000:00:1b.0: PME# disabled
[    0.160354] pci 0000:00:1c.0: PME# disabled
[    0.160498] pci 0000:00:1c.1: PME# disabled
[    0.160642] pci 0000:00:1c.2: PME# disabled
[    0.160787] pci 0000:00:1c.3: PME# disabled
[    0.161441] pci 0000:00:1d.7: PME# disabled
[    0.162043] pci 0000:00:1f.2: PME# disabled
[    0.162677] pci 0000:02:00.0: PME# disabled
[    0.166197] pci 0000:00:1e.0:   bridge window [io  0xf000-0x0000] (disabled)
[    0.166207] pci 0000:00:1e.0:   bridge window [mem 0xfff00000-0x000fffff] (disabled)
[    0.166219] pci 0000:00:1e.0:   bridge window [mem 0xfff00000-0x000fffff pref] (disabled)
[    0.167559] ACPI Error: [CAPB] Namespace lookup failure, AE_ALREADY_EXISTS (20110112/dsfield-143)
[    0.167729] ACPI Error: Method parse/execution failed [\_SB_.PCI0._OSC] (Node f682fca8), AE_ALREADY_EXISTS (20110112/psparse-536)
[    0.168113] ACPI Error: [CAPB] Namespace lookup failure, AE_ALREADY_EXISTS (20110112/dsfield-143)
[    0.168279] ACPI Error: Method parse/execution failed [\_SB_.PCI0._OSC] (Node f682fca8), AE_ALREADY_EXISTS (20110112/psparse-536)
[    0.178246] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 7 9 10 11 12) *0, disabled.
[    0.178612] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 7 9 10 11 12) *0, disabled.
[    0.179008] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 7 9 10 11 12) *0, disabled.
[    0.179375] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 7 9 10 11 12) *0, disabled.
[    0.190814] pnp 00:04: [irq 0 disabled]
[    0.235056] pci 0000:00:1e.0:   bridge window [io  disabled]
[    0.235135] pci 0000:00:1e.0:   bridge window [mem disabled]
[    0.235212] pci 0000:00:1e.0:   bridge window [mem pref disabled]
[    0.254489] Marking TSC unstable due to TSC halts in idle states deeper than C2
[    0.332589] [drm] MTRR allocation failed.  Graphics performance may suffer.

zgrep -i MTRR /proc/config.gz

CONFIG_MTRR=y
CONFIG_MTRR_SANITIZER=y
CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=2

/ proc / iomem:

00000000-0000ffff : reserved
00010000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : PCI Bus 0000:00
  000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000cf000-000cffff : Adapter ROM
000e0000-000fffff : reserved
  000f0000-000fffff : System ROM
00100000-3f375fff : System RAM
  01000000-0148cffe : Kernel code
  0148cfff-015e417f : Kernel data
  01646000-016b2fff : Kernel bss
3f376000-3f3befff : reserved
3f3bf000-3f46cfff : System RAM
3f46d000-3f4befff : ACPI Non-volatile Storage
3f4bf000-3f4effff : System RAM
3f4f0000-3f4fefff : ACPI Tables
3f4ff000-3f4fffff : System RAM
3f500000-3fffffff : reserved
40000000-febfffff : PCI Bus 0000:00
  40000000-4fffffff : 0000:00:02.0
  50000000-50ffffff : PCI Bus 0000:01
  51000000-520fffff : PCI Bus 0000:02
    51000000-5100ffff : 0000:02:00.0
      51000000-5100ffff : r8169
    51010000-51010fff : 0000:02:00.0
      51010000-51010fff : r8169
    51020000-5103ffff : 0000:02:00.0
  52100000-530fffff : PCI Bus 0000:03
  53100000-540fffff : PCI Bus 0000:04
  54100000-551fffff : PCI Bus 0000:04
  55200000-562fffff : PCI Bus 0000:03
    55200000-5520ffff : 0000:03:00.0
      55200000-5520ffff : ath5k
  56300000-572fffff : PCI Bus 0000:02
  57300000-583fffff : PCI Bus 0000:01
  58400000-5847ffff : 0000:00:02.1
  58480000-584fffff : 0000:00:02.0
  58500000-5853ffff : 0000:00:02.0
  58540000-58543fff : 0000:00:1b.0
    58540000-58543fff : ICH HD audio
  58544400-585447ff : 0000:00:1d.7
    58544400-585447ff : ehci_hcd
  58545000-58545fff : Intel Flush Page
  e0000000-efffffff : PCI MMCONFIG 0000 [bus 00-ff]
    e0000000-efffffff : reserved
      e0000000-efffffff : pnp 00:01
fec00000-fec00fff : reserved
  fec00000-fec003ff : IOAPIC 0
fed00000-fed003ff : HPET 0
fed14000-fed19fff : reserved
  fed14000-fed17fff : pnp 00:01
  fed18000-fed18fff : pnp 00:01
  fed19000-fed19fff : pnp 00:01
fed1c000-fed1ffff : reserved
  fed1c000-fed1ffff : pnp 00:01
fee00000-fee00fff : Local APIC
  fee00000-fee00fff : reserved
    fee00000-fee00fff : pnp 00:01
fff00000-ffffffff : reserved

/ proc / cpuinfo:

processor   : 0
vendor_id   : GenuineIntel
cpu family  : 6
model       : 28
model name  : Intel(R) Atom(TM) CPU N270   @ 1.60GHz
stepping    : 2
cpu MHz     : 1600.000
cache size  : 512 KB
physical id : 0
siblings    : 2
core id     : 0
cpu cores   : 1
apicid      : 0
initial apicid  : 0
fdiv_bug    : no
hlt_bug     : no
f00f_bug    : no
coma_bug    : no
fpu     : yes
fpu_exception   : yes
cpuid level : 10
wp      : yes
flags       : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dts
bogomips    : 3192.06
clflush size    : 64
cache_alignment : 64
address sizes   : 32 bits physical, 32 bits virtual
power management:

processor   : 1
vendor_id   : GenuineIntel
cpu family  : 6
model       : 28
model name  : Intel(R) Atom(TM) CPU N270   @ 1.60GHz
stepping    : 2
cpu MHz     : 1600.000
cache size  : 512 KB
physical id : 0
siblings    : 2
core id     : 0
cpu cores   : 1
apicid      : 1
initial apicid  : 1
fdiv_bug    : no
hlt_bug     : no
f00f_bug    : no
coma_bug    : no
fpu     : yes
fpu_exception   : yes
cpuid level : 10
wp      : yes
flags       : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dts
bogomips    : 3191.83
clflush size    : 64
cache_alignment : 64
address sizes   : 32 bits physical, 32 bits virtual
power management:

/ proc / mtrr:

reg00: base=0x0fffe0000 ( 4095MB), size=  128KB, count=1: write-protect
reg01: base=0x0fffc0000 ( 4095MB), size=  128KB, count=1: uncachable
reg02: base=0x000000000 (    0MB), size=  512MB, count=1: write-back
reg03: base=0x020000000 (  512MB), size=  512MB, count=1: write-back
reg04: base=0x03f800000 ( 1016MB), size=    8MB, count=1: uncachable
reg05: base=0x03f600000 ( 1014MB), size=    2MB, count=1: uncachable
reg06: base=0x03f500000 ( 1013MB), size=    1MB, count=1: uncachable
reg07: base=0x000000000 (    0MB), size=  128KB, count=1: uncachable

lshw:

helios
    description: Computer
    product: AOA150 (Napa_Fab5)
    vendor: Acer
    version: 1
    serial: LUS050A0748370F93B2535
    width: 32 bits
    capabilities: smbios-2.4 dmi-2.4
    configuration: boot=normal family=Intel_Mobile sku=Napa_Fab5 uuid=E081A8C2-6CE0-D411-BB0B-001E68E42BCA
  *-core
       description: Motherboard
       vendor: Acer
       physical id: 0
       version: Base Board Version
       serial: Base Board Serial Number
       slot: Base Board Chassis Location
     *-firmware
          description: BIOS
          vendor: Acer
          physical id: 0
          version: v0.3301
          date: 05/09/2008
          size: 1MiB
          capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int9keyboard int10video acpi usb
     *-memory
          description: System Memory
          physical id: 14
          slot: System board or motherboard
          size: 1GiB
        *-bank:0
             description: DIMM DDR2 Synchronous 533 MHz (1.9 ns)
             product: HYMP164S64CP6-Y5
             vendor: Hynix Semiconductor (Hyundai Electronics)
             physical id: 0
             serial: 0x00000000
             slot: J2
             size: 512MiB
             width: 64 bits
             clock: 533MHz (1.9ns)
        *-bank:1
             description: DIMM DDR2 Synchronous 533 MHz (1.9 ns)
             product: HYMP164S64CP6-Y5
             vendor: Hynix Semiconductor (Hyundai Electronics)
             physical id: 1
             serial: 0x00002337
             slot: J6H2
             size: 512MiB
             width: 64 bits
             clock: 533MHz (1.9ns)
     *-cpu
          description: CPU
          product: Intel(R) Atom(TM) CPU N270   @ 1.60GHz
          vendor: Intel Corp.
          physical id: 1c
          bus info: cpu@0
          version: 6.12.2
          serial: 0001-06C2-0000-0000-0000-0000
          slot: CPU
          size: 800MHz
          capacity: 1600MHz
          width: 32 bits
          clock: 533MHz
          capabilities: fpu fpu_exception wp vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm cpufreq
          configuration: id=0
        *-cache:0
             description: L2 cache
             physical id: 1d
             slot: Unknown
             size: 512KiB
             capacity: 512KiB
             capabilities: synchronous internal write-back unified
        *-cache:1
             description: L1 cache
             physical id: 1e
             slot: Unknown
             size: 32KiB
             capacity: 32KiB
             capabilities: synchronous internal write-back instruction
        *-logicalcpu:0
             description: Logical CPU
             physical id: 0.1
             width: 32 bits
             capabilities: logical
        *-logicalcpu:1
             description: Logical CPU
             physical id: 0.2
             width: 32 bits
             capabilities: logical
     *-pci
          description: Host bridge
          product: Mobile 945GME Express Memory Controller Hub
          vendor: Intel Corporation
          physical id: 100
          bus info: pci@0000:00:00.0
          version: 03
          width: 32 bits
          clock: 33MHz
          configuration: driver=agpgart-intel
          resources: irq:0
        *-display:0
             description: VGA compatible controller
             product: Mobile 945GME Express Integrated Graphics Controller
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 03
             width: 32 bits
             clock: 33MHz
             capabilities: msi pm vga_controller bus_master cap_list rom
             configuration: driver=i915 latency=0
             resources: irq:16 memory:58480000-584fffff ioport:60c0(size=8) memory:40000000-4fffffff memory:58500000-5853ffff
        *-display:1 UNCLAIMED
             description: Display controller
             product: Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller
             vendor: Intel Corporation
             physical id: 2.1
             bus info: pci@0000:00:02.1
             version: 03
             width: 32 bits
             clock: 33MHz
             capabilities: pm bus_master cap_list
             configuration: latency=0
             resources: memory:58400000-5847ffff
        *-multimedia
             description: Audio device
             product: N10/ICH 7 Family High Definition Audio Controller
             vendor: Intel Corporation
             physical id: 1b
             bus info: pci@0000:00:1b.0
             version: 02
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi pciexpress bus_master cap_list
             configuration: driver=HDA Intel latency=0
             resources: irq:45 memory:58540000-58543fff
        *-pci:0
             description: PCI bridge
             product: N10/ICH 7 Family PCI Express Port 1
             vendor: Intel Corporation
             physical id: 1c
             bus info: pci@0000:00:1c.0
             version: 02
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:40 ioport:5000(size=4096) memory:57300000-583fffff ioport:50000000(size=16777216)
        *-pci:1
             description: PCI bridge
             product: N10/ICH 7 Family PCI Express Port 2
             vendor: Intel Corporation
             physical id: 1c.1
             bus info: pci@0000:00:1c.1
             version: 02
             width: 32 bits
             clock: 33MHz
             capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
             configuration: driver=pcieport
             resources: irq:41 ioport:3000(size=8192) memory:56300000-572fffff ioport:51000000(size=17825792)
           *-network DISABLED
                description: Ethernet interface
                product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
                vendor: Realtek Semiconductor Co., Ltd.
                physical id: 0
                bus info: pci@0000:02:00.0
                logical name: eth0
                version: 02
                serial: 00:1e:68:e4:2b:ca
                size: 10Mbit/s
                capacity: 100Mbit/s
                width: 64 bits
                clock: 33MHz

    

Answer 1

Graças a harrymc, descobri que você pode reescrever / proc / mtrr. Eu coloquei o seguinte em /etc/rc.local, reiniciei e minha tabela MTRR estava correta.

echo "disable=7" > /proc/mtrr
echo "disable=6" > /proc/mtrr
echo "disable=5" > /proc/mtrr
echo "disable=4" > /proc/mtrr
echo "disable=3" > /proc/mtrr
echo "disable=2" > /proc/mtrr
echo "disable=1" > /proc/mtrr
echo "disable=0" > /proc/mtrr
echo "base=0x000000000 size=0x40000000 type=write-back" > /proc/mtrr
echo "base=0x03f500000 size=0x00100000 type=uncachable" > /proc/mtrr
echo "base=0x03f600000 size=0x00200000 type=uncachable" > /proc/mtrr
echo "base=0x03f800000 size=0x00800000 type=write-back" > /proc/mtrr
echo "base=0x040000000 size=0x10000000 type=write-combining" > /proc/mtrr

Além disso, depois de conversar com algumas pessoas que estão envolvidas com o desenvolvimento do kernel, fui informado que CONFIG_MTRR_SANITIZER foi quebrado nos últimos kernels e, portanto, porque funcionou para outros no passado.

    

Answer 2

Citando a resposta à sua própria pergunta nos fóruns do Arch Linux:

From the dmesg, it is easy to see that it runs out of mtrr during i915/drm graphics initialization. I have no specific experience with this problem, but here's my suggestions:

1. Boot with 'mtrr_spare_reg_nr=2' and you may also need 'enable_mtrr_cleanup=1 (add to kernel line in /boot/grub/menu.lst).
2. Try kernel 2.6.38 from [testing].

A partir da aparência de seu / proc / mtrr, sua CPU ATOM possui apenas 8 MTRRs, e eles estão realmente esgotados. No entanto, a forma como a memória é fragmentada em fragmentos tão pequenos é intrigante. Em geral, esse problema pode ser causado por:

• O BIOS - procure parâmetros que causam alocação de memória para dispositivos.
• A placa gráfica que pode ter memória compartilhada com a CPU e que o BIOS pode causar a ser alocado brutalmente no meio da memória.
• O driver da placa gráfica - pesquise a versão mais recente.
• Um kernel mal configurado.

O maior enigma que eu posso ver é que / proc / mtrr diz que você tem 8GB. Mas em / proc / cpuinfo, a entrada "flags" não contém "lm", que a FAQ do Arch64 diz é necessário para o processador ser compatível com x86_64. O FAQ ainda diz:

Note that Arch32 does not support more than 3GB of RAM by default: you have to turn to Arch64 if you have more.

Portanto, parece que você tem Arch32 e 8GB de RAM, o que a documentação contradiz.
Você poderia lançar alguma luz sobre esse quebra-cabeça?